|The improved hydrodynamic properties and low-profile design of Streamline goggles ensure maximum gliding efficiency in the water with minimum resistance. The goggles are fit with a double strap and a low-profile face seal that ensure their safe staying in place during diving. The lenses have a special anti-fog coating and UV 400 protection. 3 interchangeable nose bridges are enclosed. Mad Wave offers lenses with a wide dioptric range (from -1.0 to - 9.0). Lenses are provided separately.